[clang] [llvm] [PowerPC] Support -fpatchable-function-entry (PR #92997)

[Chen Zheng via llvm-commits]

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@@ -6681,7 +6681,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     StringRef S0 = A->getValue(), S = S0;
     unsigned Size, Offset = 0;
     if (!Triple.isAArch64() && !Triple.isLoongArch() && !Triple.isRISCV() &&
-        !Triple.isX86())
+        !Triple.isX86() &&
+        !(!Triple.isOSAIX() && (Triple.getArch() == llvm::Triple::ppc ||
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chenzheng1030 wrote:

Linux little endian targets are this patch's scope. This patch tries to support -fpatchable-function-entry for big endian targets but not AIX.

If we are going to support little endian, we first need to check the possibility about removal of XRAY. (XRAY also uses backend node `PATCHABLE_FUNCTION_ENTER`)

https://github.com/llvm/llvm-project/pull/92997